luketordoff
Member
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Hi everyone, got a fuel issue with my Discovery TD5, I've got no power going to the pump, the earth is fine, but there's no power, R1 relay is ok, and the 30 amp fuse is OK, any ideas on what else to look at?
Land rover
- Thread starter luketordoff
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Hi
if I may it’s customary to pop over into the introduce section first
www.landyzone.co.uk
ps, a please or thk u also goes along way
if I may it’s customary to pop over into the introduce section first
Introduce Yourself
www.landyzone.co.uk
ps, a please or thk u also goes along way
Maat
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Hello, this might seem a bit silly, but have you checked if the ECU is free of oil?
sierrafery
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Hi remove the relay and bridge the perpendiculat cavities in the fusebox with a piece of wire then measure again for voltage at the pump's plug:
1. if this way you get voltage there is a management or wiring issue on the relay coil's circuit
2. if no voltage that way the problem is on the power feed circuit and check for voltage in C0376 where the feed comes from the fusebox and from there to the pump
according to the results we'll speak again
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luketordoff
Member
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Hi, thank you for your comment, we've since found that there's a broken (black) wire coming from the fuel pressure switch, have tested all the relays and fuses, plus had pump running when tested with a power probe, do you know if the black wire coming from the fuel pressure switch is a permanent ground
luketordoff
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Yeah
sierrafery
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Black wires are ground and there is no fuel pressure switch on a Td5
luketordoff
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Hi, thank you for your comment, we've since found that there's a broken (black) wire coming from the fuel pressure switch, have tested all the relays and fuses, plus had pump running when tested with a power probe, do you know if the black wire coming from the fuel pressure switch is a permanent ground
luketordoff
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Sorry meant oil pressure switch
sierrafery
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The oil pressure switch is earthed via fixing that black wire is useless and that switch has to do only with the warning light nothing else
luketordoff
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Ok thank you do you know what else it could be please
luketordoff
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Having tested the relays with a power probe, we found R9 isn't getting power to it, if we push power though with the probe, the pump engages, so do you know what powers R9
sierrafery
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I told you in post 4 what to do and tell the result of that
luketordoff
Member
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Having tested the relays with a power probe, we found R9 isn't getting power to it, if we push power though with the probe, the pump engages, so do you know what powers R9
sierrafery
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R9 is the main relay, it is disabled if the inertia switch is triggered or that circuit interrupted, push the inertia switch first and if no joy unplug it and bridge the wires, make sure that fuse F13 is not blown first
luketordoff
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luketordoff
Member
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Thanks for your comment have been all through that, only thing we are struggling with is what powers R9, the inertia switch is fine and working
sierrafery
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